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<h1 class="topictitle1">Step 5: Creating a Backup SLA</h1>
<div><p id="EN-US_TOPIC_0000001792520410__p97143237340">Customize an SLA to protect resources based on your requirements.</p>
<div class="section" id="EN-US_TOPIC_0000001792520410__section5197184061219"><h4 class="sectiontitle">Context</h4><p id="EN-US_TOPIC_0000001792520410__p134761436101310">For details about customizing an SLA, see <a href="en-us_topic_0000001839159841.html">About SLA</a>.</p>
</div>
<div class="section"><h4 class="sectiontitle">Procedure</h4><ol><li><span>Choose <span class="uicontrol" id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839142377_uicontrol8111821122820"><b><span id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839142377_text71111921162814"><strong>Protection</strong></span> &gt; Protection Policies &gt; SLAs</b></span>.</span></li><li><span>Click <span class="uicontrol" id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_uicontrol12915192943311"><b><span id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_text39091229123315"><strong>Create</strong></span></b></span>.</span></li><li><span>Enter an SLA name. The default name is <strong id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_b694314191141">SLA_</strong><em id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_i1829310311138">Current timestamp</em>.</span></li><li><span>Select an application type for the SLA to be created.</span><p><ol type="a"><li>Click <span class="uicontrol"><b><span><strong>Applications</strong></span></b></span> and select the application for the SLA to be created.<ul><li><span id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_text10801323154310"><strong>General SLA</strong></span><p id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_p144377559348">A general SLA can be applied to resources except filesets, SQL Server, PostgreSQL, Kingbase, Redis, ClickHouse, MongoDB, NAS shares, NAS file systems, Huawei Cloud Stack GaussDB, TDSQL, Kubernetes CSI, TiDB, volumes, common shares, GaussDB T single-node systems, and object storage.</p>
</li><li><span><strong>Specific to application</strong></span><p>Select an application type of the SLA to be created, for example, NAS file system. This section describes how to create <strong><span><strong>Specific to application</strong></span></strong>.</p>
</li></ul>
</li><li>Click <span class="uicontrol"><b>OK</b></span>.</li></ol>
</p></li><li><span>Configure a backup policy.</span><p><ol type="a"><li>Click the <span class="uicontrol" id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_uicontrol1652983183617"><b><span id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_text25241931133616"><strong>Backup Policy</strong></span></b></span> icon.</li><li>Configure basic parameters for a backup policy.<p><a href="#EN-US_TOPIC_0000001792520410__table2663151516335">Table 1</a> describes the related parameters.</p>
<div class="p">Set the backup frequency, copy retention period, and backup time window based on service requirements. The recommended settings are as follows:<ul><li>The backup interval must be longer than the backup duration.</li><li>The retention period must be longer than the backup interval.</li></ul>
<div class="note"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_ul192116591633"><li id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_li921115591430">At least one backup policy must be created. To add another backup policy, click <span><img id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_image178791955235" src="en-us_image_0000001939082533.png"></span> on the right of the page.</li><li id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_li621119590319">A maximum of four backup policies can be added for each backup type.</li></ul>
</div></div>
</div>

<div class="tablenoborder"><a name="EN-US_TOPIC_0000001792520410__table2663151516335"></a><a name="table2663151516335"></a><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0000001792520410__table2663151516335" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Basic parameters of a backup policy</caption><colgroup><col style="width:11.899999999999999%"><col style="width:15.22%"><col style="width:72.88%"></colgroup><thead align="left"><tr><th align="left" class="cellrowborder" colspan="2" valign="top" id="mcps1.3.3.2.5.2.1.2.3.2.4.1.1"><p>Parameter</p>
</th>
<th align="left" class="cellrowborder" valign="top" id="mcps1.3.3.2.5.2.1.2.3.2.4.1.2"><p>Description</p>
</th>
</tr>
</thead>
<tbody><tr><td class="cellrowborder" rowspan="2" valign="top" width="11.899999999999999%" headers="mcps1.3.3.2.5.2.1.2.3.2.4.1.1 "><p><span><strong>Forever Incremental (Synthetic Full) Backup</strong></span></p>
</td>
<td class="cellrowborder" valign="top" width="15.22%" headers="mcps1.3.3.2.5.2.1.2.3.2.4.1.1 "><p><span><strong>Name</strong></span></p>
</td>
<td class="cellrowborder" valign="top" width="72.88%" headers="mcps1.3.3.2.5.2.1.2.3.2.4.1.2 "><p>Name of the policy.</p>
</td>
</tr>
<tr><td class="cellrowborder" valign="top" headers="mcps1.3.3.2.5.2.1.2.3.2.4.1.1 "><p>-</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.3.2.5.2.1.2.3.2.4.1.1 "><div class="p" id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001142022930_p1432741045617">Configure the first execution time, backup interval, copy retention period, and backup time window for forever incremental (synthetic full) backup. The initial backup is a full backup by default.<ul id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001142022930_ul06281446133611"><li id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001142022930_li5628184619364">Configure the backup frequency and copy retention period for forever incremental (synthetic full) backup.<ul id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001142022930_ul3912541183319"><li id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001142022930_li1491311419338"><span id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001142022930_text881714512382"><strong>By Year</strong></span><p id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001142022930_p7913141173316">Configure the job to be executed once every year on <em id="EN-US_TOPIC_0000001792520410__i115071451115915">xx</em> (month) <em id="EN-US_TOPIC_0000001792520410__i85081951155911">xx</em> (day). Set copies to be retained for <em id="EN-US_TOPIC_0000001792520410__i125081851105915">xx</em> days, weeks, months, years, or permanently.</p>
<p id="EN-US_TOPIC_0000001792520410__p15705048154816">If the date does not exist in the year, no copy is generated.</p>
</li><li id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001142022930_li18913134153311"><span id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001142022930_text9120524389"><strong>By Month</strong></span><p id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001142022930_p19131141133318">Configure the job to be executed on <em id="EN-US_TOPIC_0000001792520410__i99631319400">xx</em> (day) (multiple days can be selected) or the last day of each month. Set copies to be retained for <em id="EN-US_TOPIC_0000001792520410__i49631919709">xx</em> days, weeks, months, years, or permanently.</p>
<p id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001142022930_p131866516465">If the backup job is set to be executed on the <em id="EN-US_TOPIC_0000001792520410__i2040959938104823">xx</em>th day of each month, no copy is generated when the date does not exist in the current month.</p>
</li><li id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001142022930_li79137410332"><span id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001142022930_text107501579380"><strong>By Week</strong></span><p id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001142022930_p091313410338">Configure the job to be executed every Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday (you can select multiple options). Set copies to be retained for <em id="EN-US_TOPIC_0000001792520410__i1534816497010">xx</em> days, weeks, months, years, or permanently.</p>
</li><li id="EN-US_TOPIC_0000001792520410__li251355615915"><span id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_text0935195916812"><strong>By Day</strong></span><p id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_p175137561491">Configure the job to be executed every <em id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_i1716654814490">xx</em> days starting from <em id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_i19166114815493">xx</em> (year) <em id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_i416610485494">xx</em> (month) <em id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_i1316764824912">xx</em> (day). Configure copies to be retained for <em id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_i1116704854913">xx</em> days, weeks, months, years, or permanently.</p>
</li><li id="EN-US_TOPIC_0000001792520410__li17513125616918"><span id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_text14231841203315"><strong>By Hour</strong></span><p id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_p6350614134914">Configure the job to be executed every <em id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_i3449105714464">xx</em> hours starting from <em id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_i1644985754613">xx</em> (year) <em id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_i1044916576462">xx</em> (month) <em id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_i15449257134618">xx</em> (day). Configure copies to be retained for <em id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_i64501457104615">xx</em> days, weeks, months, years, or permanently.</p>
</li><li id="EN-US_TOPIC_0000001792520410__li108498361016"><span id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_text4119140183416"><strong>By Minute</strong></span><p id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_p178491339103">Configure the job to be executed every <em id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_i103229137503">xx</em> minutes starting from <em id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_i832217134501">xx</em> (year) <em id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_i11323131375017">xx</em> (month) <em id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_i63231113195016">xx</em> (day). Configure copies to be retained for <em id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_i1932361355019">xx</em> days, weeks, months, years, or permanently.</p>
</li></ul>
</li><li id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001142022930_li1881682412376">Set the allowed time period for executing <span id="EN-US_TOPIC_0000001792520410__text1857102419400"><strong>Forever Incremental (Synthetic Full) Backup</strong></span>. <span id="EN-US_TOPIC_0000001792520410__text18691102974019"><strong>Forever Incremental (Synthetic Full) Backup</strong></span> jobs will not be scheduled at the time beyond the time period.<div class="note" id="EN-US_TOPIC_0000001792520410__note494342516528"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_ul64461851101420"><li id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_li037445621410">If the end time is earlier than or the same as the start time, the end time is actually the end time of the next day.</li><li id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_li4446145117142">If the backup job is not completed within the specified time window, the system does not stop the backup job, but reports an event.</li><li id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_li4684315367">Once the retention period expires, the system automatically deletes the expired copies.</li></ul>
</div></div>
</li></ul>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</li><li>Configure advanced parameters for the backup policy.<div class="p"><a href="#EN-US_TOPIC_0000001792520410__table4195113413815">Table 2</a> describes the related parameters.
<div class="tablenoborder"><a name="EN-US_TOPIC_0000001792520410__table4195113413815"></a><a name="table4195113413815"></a><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0000001792520410__table4195113413815" frame="border" border="1" rules="all"><caption><b>Table 2 </b>Advanced parameters of a backup policy</caption><colgroup><col style="width:44.46%"><col style="width:55.54%"></colgroup><thead align="left"><tr><th align="left" class="cellrowborder" valign="top" width="44.46%" id="mcps1.3.3.2.5.2.1.3.1.2.2.3.1.1"><p>Parameter</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="55.54%" id="mcps1.3.3.2.5.2.1.3.1.2.2.3.1.2"><p>Description</p>
</th>
</tr>
</thead>
<tbody><tr><td class="cellrowborder" valign="top" width="44.46%" headers="mcps1.3.3.2.5.2.1.3.1.2.2.3.1.1 "><p><span><strong>Specify Target Location</strong></span></p>
</td>
<td class="cellrowborder" valign="top" width="55.54%" headers="mcps1.3.3.2.5.2.1.3.1.2.2.3.1.2 "><div class="p">If you have deployed the cluster HA feature, specify the target storage location for the backup copy. If no target location is specified, the system automatically selects a backup target storage unit through intelligent balancing.<ul id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_ul3832679403"><li id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_li178323718400">Backup storage unit: corresponds to a backup cluster node. After a backup storage unit is selected, copies are stored to the storage unit. If the capacity of the storage unit is insufficient, the backup job will fail.</li><li id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_li31700914016">Backup storage unit group: is a collection of backup storage units. After a backup storage unit group is selected, the system automatically selects a target backup storage unit based on the storage policy of the storage unit group.</li></ul>
</div>
</td>
</tr>
<tr><td class="cellrowborder" valign="top" width="44.46%" headers="mcps1.3.3.2.5.2.1.3.1.2.2.3.1.1 "><p><span><strong>Rate Limiting Policies</strong></span></p>
</td>
<td class="cellrowborder" valign="top" width="55.54%" headers="mcps1.3.3.2.5.2.1.3.1.2.2.3.1.2 "><p>Average maximum amount of data that can be transmitted per second in a backup job. </p>
<p>Select a rate limiting policy created in <a href="en-us_topic_0000001792520438.html">(Optional) Step 4: Creating a Rate Limiting Policy</a>.</p>
</td>
</tr>
<tr><td class="cellrowborder" valign="top" width="44.46%" headers="mcps1.3.3.2.5.2.1.3.1.2.2.3.1.1 "><p><span><strong>Automatic Indexing</strong></span></p>
</td>
<td class="cellrowborder" valign="top" width="55.54%" headers="mcps1.3.3.2.5.2.1.3.1.2.2.3.1.2 "><div class="p" id="EN-US_TOPIC_0000001792520410__p169751434463">After this function is enabled, you can search for files, directories, or links in copies.<div class="note" id="EN-US_TOPIC_0000001792520410__note05471921141918"><span class="notetitle"> NOTE: </span><div class="notebody"><p id="EN-US_TOPIC_0000001792520410__p0743109201911">Indexes occupy backup storage space. If the number of index files in the system exceeds 1 billion, perform operations by referring to "Failed To Create A Copy Index" in the <em id="EN-US_TOPIC_0000001792520410__i10610434111713"><i><cite id="EN-US_TOPIC_0000001792520410__cite23814569190">OceanProtect <span id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001792502994_ph187704762018">Appliance 1.5.0-1.6.0</span> Troubleshooting</cite></i></em>.</p>
</div></div>
</div>
</td>
</tr>
<tr><td class="cellrowborder" valign="top" width="44.46%" headers="mcps1.3.3.2.5.2.1.3.1.2.2.3.1.1 "><p><span><strong>Target Deduplication</strong></span></p>
</td>
<td class="cellrowborder" valign="top" width="55.54%" headers="mcps1.3.3.2.5.2.1.3.1.2.2.3.1.2 "><p>After this function is enabled, the amount of data before copy data reduction increases. Exercise caution when performing this operation.</p>
</td>
</tr>
<tr><td class="cellrowborder" valign="top" width="44.46%" headers="mcps1.3.3.2.5.2.1.3.1.2.2.3.1.1 "><div class="p"><strong id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_b693713423122">Job Timeout Alarm</strong><div class="note" id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_note379352823112"><span class="notetitle"> NOTE: </span><div class="notebody"><p id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_en-us_topic_0000001839143213_p8320153562113">This parameter is available only in 1.6.0 and later versions.</p>
</div></div>
</div>
</td>
<td class="cellrowborder" valign="top" width="55.54%" headers="mcps1.3.3.2.5.2.1.3.1.2.2.3.1.2 "><p>After this function is enabled, an alarm is sent if the job execution time exceeds the time window. The alarm needs to be manually cleared.</p>
</td>
</tr>
<tr><td class="cellrowborder" valign="top" width="44.46%" headers="mcps1.3.3.2.5.2.1.3.1.2.2.3.1.1 "><p><span id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_text15514111782"><strong>Job Failure Alarm</strong></span></p>
</td>
<td class="cellrowborder" valign="top" width="55.54%" headers="mcps1.3.3.2.5.2.1.3.1.2.2.3.1.2 "><p>After this function is enabled, an alarm is automatically sent if a job fails and is automatically cleared after successful execution.</p>
</td>
</tr>
<tr><td class="cellrowborder" valign="top" width="44.46%" headers="mcps1.3.3.2.5.2.1.3.1.2.2.3.1.1 "><p><span><strong>Automatic Retry</strong></span></p>
</td>
<td class="cellrowborder" valign="top" width="55.54%" headers="mcps1.3.3.2.5.2.1.3.1.2.2.3.1.2 "><p>After this function is enabled, the system automatically retries if a periodic backup job fails.</p>
<div class="p">The number of retries ranges from 1 to 5, and the wait time ranges from 1 to 30 minutes. For example, if the number of retries is set to 3 and the wait time is set to 5 minutes, the system retries for a total of three times at an interval of 5 minutes.<div class="note" id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_note139701345152818"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_ul264071314279"><li id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_li1864001332715">During automatic retry, the system creates a backup job. The backup job is executed only when it is within the preset time window.</li><li id="EN-US_TOPIC_0000001792520410__en-us_topic_0000001839143189_li116401113172713">This function takes effect only during periodic backup. Automatic retry is not supported if a backup job fails to be manually initiated.</li></ul>
</div></div>
</div>
</td>
</tr>
</tbody>
</table>
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</div>
</li><li>Click <span class="uicontrol"><b><span><strong>OK</strong></span></b></span>.</li></ol>
</p></li><li id="EN-US_TOPIC_0000001792520410__li1051242181817"><span>(Optional) Configure archive policies.</span><p><p id="EN-US_TOPIC_0000001792520410__p372431134">The built-in storage space of the <span id="EN-US_TOPIC_0000001792520410__text19690193371312">OceanProtect</span> is limited. If you need to retain copy data for a long time, you are advised to archive the copy data to external storage.</p>
<p id="EN-US_TOPIC_0000001792520410__p1430810361667">You can configure the archive policies by clicking <span class="uicontrol" id="EN-US_TOPIC_0000001792520410__uicontrol12308113618612"><b><span id="EN-US_TOPIC_0000001792520410__text95301130194917"><strong>Archive Policy</strong></span></b></span> or by modifying the SLA.</p>
<p id="EN-US_TOPIC_0000001792520410__p56570221159">For details about how to configure the archive policies, see <a href="en-us_topic_0000001792360754.html">Step 2: Creating an Archive SLA for Backup Copies</a>.</p>
</p></li><li id="EN-US_TOPIC_0000001792520410__li16732183612397"><span>(Optional) Configure replication policies.</span><p><p id="EN-US_TOPIC_0000001792520410__p149315199820">The <span id="EN-US_TOPIC_0000001792520410__text520613431316">OceanProtect</span> allows you to replicate local data to a remote data center. In case a disaster occurs, copy data in the remote data center can be used to restore production data and services can be taken over, achieving remote data protection.</p>
<p id="EN-US_TOPIC_0000001792520410__p1713317158910">You can configure the replication policies by clicking <span class="uicontrol" id="EN-US_TOPIC_0000001792520410__uicontrol111335151290"><b><span id="EN-US_TOPIC_0000001792520410__text1466823185112"><strong>Replication Policy</strong></span></b></span> or by modifying the SLA.</p>
<p id="EN-US_TOPIC_0000001792520410__p9133115290">For details about how to configure the replication policies, see <a href="en-us_topic_0000001839239741.html">Step 7: Creating a Replication SLA</a>.</p>
</p></li><li id="EN-US_TOPIC_0000001792520410__li1618195321716"><span>Click <span class="uicontrol" id="EN-US_TOPIC_0000001792520410__uicontrol65831059121713"><b><span id="EN-US_TOPIC_0000001792520410__text659554117329"><strong>OK</strong></span></b></span>.</span></li></ol>
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<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0000001839159849.html">Backing Up a NAS File System</a></div>
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